Knock Out KO Drum Sizing

PROPOSAL

:

EINT - 1401

TAG NO.

:

D-214 I/J

CLIENT

:

BANGLADESH GAS FIELD COMPANY LTD

TYPE

:

HORIZONTAL, 2 PHASE

SERVICE

:

FLARE FLARE KNOCK OUT DRUM

CASE

:

DESIGN FLOW RATE

PT.ISTANA PT.IST ANA KARANG KARANG LAUT HORIZONTAL S EPARATOR EPARATOR

Refer to API 521 Guide for Pressure Relieving & Depressuring Systems VAPOR

=

152460.0  lb/hr  152460.0 lb/hr 

Refer to Hysis with 10% tolerance

LIQUID

=

   

592.2   lb/hr 

Refer to Hysis with 10% tolerance

VAPOR DENSITY

=

 

0.061   lb/ft3

Refer to Hysis

VAPOR VISCOSITY

=

 

0.011

Refer to Hysis

LIQUID DENSITY

=

 

52.3   lb/ft3

DP

=

Note :

1 micron = 3.28E-06 ft

General separator 150 micron refer to GPSA Sect 7 

9.8E-04 ft

General separator 10~140 micr micron on without mist flooding refer to Maurice Arnold  3

KO drum 300~600 micron refer to API 521

3

KO drum 300~500 micron refer to M aurice Arnold 

VAPOR RATE

=

694.9

ft /sec

LIQUID RATE

=

0.003

ft /sec

g = GRAVIT GRAVITAT ATION IONAL AL ACCELER ACCELERAT ATIO IO

=

DEMISTER

=

NO

C.RE

=

2524.8

C

=

1.7

P = OPERATING PRESSURE

=

5.0   psig

PDESIGN

=

2

 

32.2   ft/sec2

Refer to Fig 20 API 521

3.5   barg

=

65.3

P DESIGN  = 3.5 b arg for vessel/drum about atmospheric pressure

psia

T = OPER OPERAT ATIN ING G TEMPE EMPER RATUR ATURE E

=

7.9

o

C

Refer to Hysis

TDESIGN

=

40.0

o

C

T DESIGN  = T + 30  C 

=

104.0

o

F

TC = CORROSI ON ON AL LO LOW AN ANCE

o

=

3.0

mm

=

0.1

in inch

S = ALLO ALLOWA WABL BLE E STR STRESS ESS OF CS

=

E = JOINT EFFICIENCY

=

0.9

UC = LIQ LIQUID DROP OUT OUT VELO VELOC CITY ITY

=

4.59 4.599 9

SL S LOP DAN DRAIN VOLUME

=

 AL1 (B)

Refer to Hysis

300.0   micron

=

(A)

Cp

 

17500.0   psia

 Assumption refer to W.Y. Svrcek, W.D. Monnery 

ft/se t/sec c

50   gallon

=

6.68

=

6.68 /L

Refer to API 521

3

ft /lenght

HOLDING HOLDING AND SURGE SURGE VOLUM VOLUME E TAKE

=

 AL2

=

5.66

=

5.66 /L

(C )

AV = AT - (AL1 + AL2)

(D)

DT = HT = HL1 + HL2 + HV

(E)

Φ = LIQUID DROP OUT TIME

(F)

UV = VAPOR VELOCITY

(G)

LMIN = DRUM LENGTH

30   minutes

20 ~ 30 minutes referred to API 521

3

ft /lenght

TRIALL & ERROR :

The table below should be hiden during printing DT

L

ft

ft

1

4.0

46.6

2

5.0

3

AT

AL1

AL2

AV

L/DT

Trial No

(AL1 /AT) 2

2

ft  

2

ft

ft

HL1

(AL1 + AL2)

ft

ft

(HL1 /DT)

2

ft

2

(AL1 +

(HL1 +

AL2)/AT

HL2)/DT

(HL1 + HL2)

HL2

HV

Φ

UV

LMIN

ft

ft

ft

sec

ft f t/ sec

ft

T SHELL

T SHELL

T HEAD

mm

mm

mm

(L/LMIN)

11 1 1.6

12.6

0.1

0.1

12.3

0.01143

0.03

0.13

0.3

0.02111

0.052531

0.21012

0.080

3.790

0.8

56 56.5

46.6

1.0

5 .7

6.0

5.7

37.4

7.5

19.6

0.2

0.2

19.3

0.00910

0.03

0.14

0.3

0.01681

0.044127

0.22063

0.086

4.779

1.0

36 36.0

37.4

1.0

6 .4

8.0

6.3

6.0

31.3

5.2

28.3

0.2

0.2

27.9

0.00756

0.02

0.14

0.4

0.01396

0.038150

0.22890

0.090

5.771

1.3

24 24.9

31.3

1.0

7 .0

8.0

7.0

4

7.0

26.9

3.8

38.5

0.2

0.2

38.0

0.00646

0.02

0.14

0.5

0.01193

0.033667

0.23567

0.093

6.764

1.5

18 18.3

26.9

1.0

7 .7

8.0

7.7

5

8.0

23.6

2.9

50.2

0.3

0.2

49.7

0.00564

0.02

0.15

0.5

0.01042

0.030173

0.24139

0.096

7.759

1.7

14 14.0

23.6

1.0

8 .4

 

10.0

8.4

6

9.0

21.0

2.3

63.6

0.3

0.3

63.0

0.00501

0.02

0.15

0.6

0.00925

0.027371

0.24634

0.098

8.754

1.9

11 11.0

21.0

1.0

9 .0

 

10.0

9.0

Note : Thickness : 4/6/8/10/12/16/20/24/…..mm

2061.8 mm

HV

AV

ID 28.39 mm

43.45 mm

HL1

L

HL2

AL2

AL1

PROPOSAL

:

EINT - 1401

CLIENT

:

BANGLADESH GAS FIELD COMPANY LTD

TAG NO.

TYPE : HORIZONTAL, 2 PHASE

: D-214 I/J

SERVICE

:

FLARE KNOCK OUT DRUM

CASE : DESIGN FLOW RATE

PT.ISTANA KARANG LAUT HORIZONTAL SEPARATOR

Refer to API 521 Guide for Pr essure Relieving & Depressuring Systems VAPOR

=

LIQUID

=

   

152460.0   lb/hr 

Refer to Hysis with 10% tolerance

592.2   lb/hr 

Refer to Hysis with 10% tolerance

VAPOR DENSITY

=

 

0.061   lb/ft

VAPOR VISCOSITY

=

 

0.011

LIQUID DENSITY

=

 

DP

=

Refer to Hysis

Cp

Refer to Hysis

52.3   lb/ft3

Refer to Hysis

600.0   micron

=

1 micron = 3.28E-06 ft

General separator 150 micron refer to GPSA Sect 7  General separator 10~140 micron without mist flooding refer to Maurice Arnold 

3

=

694.9

ft /sec

LIQUID RATE

=

0.003

ft /sec

g = GRAVITATIONAL ACCELERATIO

=

DEMISTER

=

NO

2

Note :

2.0E-03 ft

VAPOR RATE

 

KO drum 300~600 micron refer to API 521

3

32.2   ft/sec

=

20198.7

C

=

0.8

P = OPERATING PRESSURE

=

5.0   psig

PDESIGN

=

C.RE

KO drum 300~500 micron refer to Maurice Arnold 

2

Refer to Fig 20 API 521

3.5   barg 6 5. 3

P DESIGN  = 3.5 barg for vessel/drum about atmospheric pressure

p sia

T = OPERATING TEMPERATURE

=

7.9

o

C

Refer to Hysis

TDESIGN

=

40.0

o

C

T DESIGN  = T + 30  C 

=

104.0

o

F

TC = CORROSI ON A LLOW ANCE

3.0

mm

=

0.1

inch

=

E = JOINT EFFICIENCY

=

0.9

****

UC = L IQUID DROP OUT V EL OCITY

=

9. 48 0

(A)

SLOP DAN DRAIN VOLUME

=

 AL1

o

=

S = ALLOWABLE STRESS OF CS

(B)

3

 

17500.0   psia

 Assumption refer to W.Y. Svrcek, W .D. Monnery 

ft/sec

50   gallon

=

6.68

=

6.68 /L

Refer to API 521

3

ft /lenght

HOLDING AND SURGE VOLUME TAKE

=

 AL2

=

5.66

=

5.66 /L

(C )

AV = AT - (AL1 + AL2)

(D)

DT = HT = HL1 + HL2 + HV

(E)

Φ = LIQUID DROP OUT TIME

(F)

UV = VAPOR VELOCITY

(G)

LMIN = DRUM LENGTH

30   minutes

20 ~ 30 minutes referred to API 521

3

ft /lenght

TRIALL & ERROR :

DT

L

ft

ft

1

4.0

22.2

5.6

12.6

2

5.0

17.9

3.6

19.6

3

6.0

15.0

2.5

28.3

4

7.0

12.9

1.8

5

8.0

11.3

6

9.0

10.1

L/DT

Trial No

AT 2

ft

AL1 2

AL2 2

AV

HL1

(AL1 + AL2)

ft

ft

0.1

0.2

0.0

0.2

0.0

0.3

0.01350

0.0

49.1

0.01178

62.4

0.01045

(AL1 /AT)

ft

0.301

0.255

12.0

0.02393

0.374

0.317

18.9

0.01905

0.447

0.378

27.4

0.01581

38.5

0.519

0.440

37.5

1.4

50.2

0.592

0.501

1.1

63.6

0.664

0.562

(HL1 + HL2)

HL2

HV

Φ

UV

LMIN

ft

ft

ft

sec

ft/sec

ft

0.089700

0.35880

0.128

3.641

0.4

57.9

22.2

0.076378

0.38189

0.139

4.618

0.5

36.7

17.9

0.066791

0.40075

0.148

5.599

0.6

25.3

15.0

0.02494

0.059501

0.41651

0.156

6.583

0.7

18.5

1.1

0.02176

0.053742

0.42993

0.163

7.570

0.8

1.2

0.01929

0.049061

0.44155

0.169

8.558

0.9

(AL1 +

(HL1 +

AL2)/AT

HL2)/DT

0.6

0.04420

0.7

0.03518

0.8

0.02919

0.3

1.0

0.0

0.3

0.0

0.3

(HL1 /DT)

2

ft

Note : Thickness : 4/6/8/10/12/16/20/24/…..mm

ft

2

T SHELL

T SHELL

T HEAD

mm

mm

mm

1.0

5.7

6.0

5.7

6.0   279.3

34.9

1.0

6.4

8.0

6.3

8.0   280.7

54.5

1.0

7.0

8.0

7.0

8.0   281.9

78.5

2102.1

12.9

1.0

7.7

8.0

7.7

8.0   2 82 .8

1 06 .8

22 73. 0

14.1

11.3

1.0

8.4

 

10.0

8.4

 

10.0   28 3.6

1 39 .5

30 85. 6

11.1

10.1

1.0

9.0

 

10.0

9.0

 

10.0   28 4.3

1 76 .6

33 60. 9

(L/LMIN)

T HEAD ASHELL mm

2

ft

AHEAD 2

ft

W kg 1374.4 1955.4